/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "cmsis_os.h"
#include "app_touchgfx.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#define REFRESH_COUNT                    ((uint32_t)0x0569)   /* SDRAM refresh counter (90Mhz SD clock) */
#define SDRAM_TIMEOUT     ((uint32_t)0xFFFF)
/**
  * @brief  FMC SDRAM Mode definition register defines
  */
#define SDRAM_MODEREG_BURST_LENGTH_1             ((uint16_t)0x0000)
#define SDRAM_MODEREG_BURST_LENGTH_2             ((uint16_t)0x0001)
#define SDRAM_MODEREG_BURST_LENGTH_4             ((uint16_t)0x0002)
#define SDRAM_MODEREG_BURST_LENGTH_8             ((uint16_t)0x0004)
#define SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL      ((uint16_t)0x0000)
#define SDRAM_MODEREG_BURST_TYPE_INTERLEAVED     ((uint16_t)0x0008)
#define SDRAM_MODEREG_CAS_LATENCY_2              ((uint16_t)0x0020)
#define SDRAM_MODEREG_CAS_LATENCY_3              ((uint16_t)0x0030)
#define SDRAM_MODEREG_OPERATING_MODE_STANDARD    ((uint16_t)0x0000)
#define SDRAM_MODEREG_WRITEBURST_MODE_PROGRAMMED ((uint16_t)0x0000) 
#define SDRAM_MODEREG_WRITEBURST_MODE_SINGLE     ((uint16_t)0x0200)

#define LCD_RST_HIGH	(GPIOB->BSRR |= GPIO_PIN_13)
#define LCD_RST_LOW		(GPIOB->BSRR |= (uint32_t)GPIO_PIN_13 << 16U)
#define LCD_CSX_HIGH	(GPIOB->BSRR |= GPIO_PIN_14)
#define LCD_CSX_LOW		(GPIOB->BSRR |= (uint32_t)GPIO_PIN_14 << 16U)
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
CRC_HandleTypeDef hcrc;

DMA2D_HandleTypeDef hdma2d;

I2C_HandleTypeDef hi2c1;

LTDC_HandleTypeDef hltdc;

USART_HandleTypeDef husart2;

NOR_HandleTypeDef hnor1;
SDRAM_HandleTypeDef hsdram1;

/* Definitions for TouchGFXTask */
osThreadId_t TouchGFXTaskHandle;
const osThreadAttr_t TouchGFXTask_attributes = {
  .name = "TouchGFXTask",
  .priority = (osPriority_t) osPriorityNormal,
  .stack_size = 2048
};
/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_FMC_Init(void);
static void MX_CRC_Init(void);
static void MX_LTDC_Init(void);
static void MX_DMA2D_Init(void);
static void MX_I2C1_Init(void);
static void MX_USART2_Init(void);
void TouchGFX_Task(void *argument);

/* USER CODE BEGIN PFP */
static void BSP_SDRAM_Initialization_sequence(uint32_t RefreshCount);
static void LCD_init(void);
static void SPI_WriteComm(uint8_t data);
static void SPI_WriteData(uint8_t data);
static uint8_t Bit_Reversal(uint8_t v);
void HAL_USART_TxCpltCallback(USART_HandleTypeDef *husart);
/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
#ifdef USE_SEGGER
	DWT->CTRL |= (1 << 0);    // Enable Cycle Counter for SEGGER
#endif
  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */
    // LCD_init(); must be inserted before MX_TouchGFX_Init();
  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_FMC_Init();
  MX_CRC_Init();
  MX_LTDC_Init();
  MX_DMA2D_Init();
  MX_I2C1_Init();
  MX_USART2_Init();
  LCD_init();
  MX_TouchGFX_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */
  /* Init scheduler */
  osKernelInitialize();

  /* USER CODE BEGIN RTOS_MUTEX */
  /* add mutexes, ... */
  /* USER CODE END RTOS_MUTEX */

  /* USER CODE BEGIN RTOS_SEMAPHORES */
  /* add semaphores, ... */
  /* USER CODE END RTOS_SEMAPHORES */

  /* USER CODE BEGIN RTOS_TIMERS */
  /* start timers, add new ones, ... */
  /* USER CODE END RTOS_TIMERS */

  /* USER CODE BEGIN RTOS_QUEUES */
  /* add queues, ... */
#ifdef USE_SEGGER
  SEGGER_SYSVIEW_Conf();
  SEGGER_SYSVIEW_Start();
#endif
  /* USER CODE END RTOS_QUEUES */

  /* Create the thread(s) */
  /* creation of TouchGFXTask */
  TouchGFXTaskHandle = osThreadNew(TouchGFX_Task, NULL, &TouchGFXTask_attributes);

  /* USER CODE BEGIN RTOS_THREADS */
  /* add threads, ... */
  /* USER CODE END RTOS_THREADS */

  /* Start scheduler */
  osKernelStart();

  /* We should never get here as control is now taken by the scheduler */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};

  /** Configure the main internal regulator output voltage
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the CPU, AHB and APB busses clocks
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 25;
  RCC_OscInitStruct.PLL.PLLN = 360;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Activate the Over-Drive mode
  */
  if (HAL_PWREx_EnableOverDrive() != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB busses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
  {
    Error_Handler();
  }
  PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_LTDC;
  PeriphClkInitStruct.PLLSAI.PLLSAIN = 192;
  PeriphClkInitStruct.PLLSAI.PLLSAIR = 5;   //4: LCD_CLK=12MHz
  PeriphClkInitStruct.PLLSAIDivR = RCC_PLLSAIDIVR_4;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief CRC Initialization Function
  * @param None
  * @retval None
  */
static void MX_CRC_Init(void)
{

  /* USER CODE BEGIN CRC_Init 0 */

  /* USER CODE END CRC_Init 0 */

  /* USER CODE BEGIN CRC_Init 1 */

  /* USER CODE END CRC_Init 1 */
  hcrc.Instance = CRC;
  if (HAL_CRC_Init(&hcrc) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN CRC_Init 2 */

  /* USER CODE END CRC_Init 2 */

}

/**
  * @brief DMA2D Initialization Function
  * @param None
  * @retval None
  */
static void MX_DMA2D_Init(void)
{

  /* USER CODE BEGIN DMA2D_Init 0 */

  /* USER CODE END DMA2D_Init 0 */

  /* USER CODE BEGIN DMA2D_Init 1 */

  /* USER CODE END DMA2D_Init 1 */
  hdma2d.Instance = DMA2D;
  hdma2d.Init.Mode = DMA2D_M2M;
  hdma2d.Init.ColorMode = DMA2D_OUTPUT_ARGB8888;
  hdma2d.Init.OutputOffset = 0;
  hdma2d.LayerCfg[1].InputOffset = 0;
  hdma2d.LayerCfg[1].InputColorMode = DMA2D_INPUT_ARGB8888;
  hdma2d.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
  hdma2d.LayerCfg[1].InputAlpha = 0;
  if (HAL_DMA2D_Init(&hdma2d) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_DMA2D_ConfigLayer(&hdma2d, 1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN DMA2D_Init 2 */

  /* USER CODE END DMA2D_Init 2 */

}

/**
  * @brief I2C1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_I2C1_Init(void)
{

  /* USER CODE BEGIN I2C1_Init 0 */
  HAL_I2C_DeInit(&hi2c1);
  /* USER CODE END I2C1_Init 0 */

  /* USER CODE BEGIN I2C1_Init 1 */

  /* USER CODE END I2C1_Init 1 */
  hi2c1.Instance = I2C1;
  hi2c1.Init.ClockSpeed = 100000;
  hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
  hi2c1.Init.OwnAddress1 = 0;
  hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
  hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
  hi2c1.Init.OwnAddress2 = 0;
  hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
  hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
  if (HAL_I2C_Init(&hi2c1) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure Analogue filter
  */
  if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure Digital filter
  */
  if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN I2C1_Init 2 */

  /* USER CODE END I2C1_Init 2 */

}

/**
  * @brief LTDC Initialization Function
  * @param None
  * @retval None
  */
static void MX_LTDC_Init(void)
{

  /* USER CODE BEGIN LTDC_Init 0 */

  /* USER CODE END LTDC_Init 0 */

  LTDC_LayerCfgTypeDef pLayerCfg = {0};

  /* USER CODE BEGIN LTDC_Init 1 */

  /* USER CODE END LTDC_Init 1 */
  hltdc.Instance = LTDC;
  hltdc.Init.HSPolarity = LTDC_HSPOLARITY_AL;
  hltdc.Init.VSPolarity = LTDC_VSPOLARITY_AL;
  hltdc.Init.DEPolarity = LTDC_DEPOLARITY_AL;
  hltdc.Init.PCPolarity = LTDC_PCPOLARITY_IPC;

  hltdc.Init.HorizontalSync = 40;
  hltdc.Init.VerticalSync = 9;
  hltdc.Init.AccumulatedHBP = 42;
  hltdc.Init.AccumulatedVBP = 11;
  hltdc.Init.AccumulatedActiveW = 522;
  hltdc.Init.AccumulatedActiveH = 283;
  hltdc.Init.TotalWidth = 524;
  hltdc.Init.TotalHeigh = 285;

  /*
  hltdc.Init.HorizontalSync = 3;
  hltdc.Init.VerticalSync = 3;
  hltdc.Init.AccumulatedHBP = 7;
  hltdc.Init.AccumulatedVBP = 7;
  hltdc.Init.AccumulatedActiveW = 487;
  hltdc.Init.AccumulatedActiveH = 327;
  hltdc.Init.TotalWidth = 491;
  hltdc.Init.TotalHeigh = 331;
  */
  hltdc.Init.Backcolor.Blue = 0;
  hltdc.Init.Backcolor.Green = 0;
  hltdc.Init.Backcolor.Red = 0;
  if (HAL_LTDC_Init(&hltdc) != HAL_OK)
  {
    Error_Handler();
  }
  pLayerCfg.WindowX0 = 0;
  pLayerCfg.WindowX1 = 480;
  pLayerCfg.WindowY0 = 0;
  pLayerCfg.WindowY1 = 272;
  pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_RGB888;
  pLayerCfg.Alpha = 255;
  pLayerCfg.Alpha0 = 0;
  pLayerCfg.BlendingFactor1 = LTDC_BLENDING_FACTOR1_CA;
  pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR2_CA;
  pLayerCfg.FBStartAdress = 0xC0000000;
  pLayerCfg.ImageWidth = 480;
  pLayerCfg.ImageHeight = 272;
  pLayerCfg.Backcolor.Blue = 0;
  pLayerCfg.Backcolor.Green = 0;
  pLayerCfg.Backcolor.Red = 0;
  if (HAL_LTDC_ConfigLayer(&hltdc, &pLayerCfg, 0) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN LTDC_Init 2 */

  /* USER CODE END LTDC_Init 2 */

}

/**
  * @brief USART2 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART2_Init(void)
{

  /* USER CODE BEGIN USART2_Init 0 */

  /* USER CODE END USART2_Init 0 */

  /* USER CODE BEGIN USART2_Init 1 */

  /* USER CODE END USART2_Init 1 */
  husart2.Instance = USART2;
  husart2.Init.BaudRate = 115200;
  husart2.Init.WordLength = USART_WORDLENGTH_9B;
  husart2.Init.StopBits = USART_STOPBITS_1;
  husart2.Init.Parity = USART_PARITY_NONE;
  husart2.Init.Mode = USART_MODE_TX;
  husart2.Init.CLKPolarity = USART_POLARITY_LOW;
  husart2.Init.CLKPhase = USART_PHASE_1EDGE;
  husart2.Init.CLKLastBit = USART_LASTBIT_ENABLE;
  if (HAL_USART_Init(&husart2) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART2_Init 2 */

  /* USER CODE END USART2_Init 2 */

}

/* FMC initialization function */
static void MX_FMC_Init(void)
{

  /* USER CODE BEGIN FMC_Init 0 */

  /* USER CODE END FMC_Init 0 */

  FMC_NORSRAM_TimingTypeDef Timing = {0};
  FMC_SDRAM_TimingTypeDef SdramTiming = {0};

  /* USER CODE BEGIN FMC_Init 1 */

  /* USER CODE END FMC_Init 1 */

  /** Perform the NOR1 memory initialization sequence
  */
  hnor1.Instance = FMC_NORSRAM_DEVICE;
  hnor1.Extended = FMC_NORSRAM_EXTENDED_DEVICE;
  /* hnor1.Init */
  hnor1.Init.NSBank = FMC_NORSRAM_BANK1;
  hnor1.Init.DataAddressMux = FMC_DATA_ADDRESS_MUX_DISABLE;
  hnor1.Init.MemoryType = FMC_MEMORY_TYPE_NOR;
  hnor1.Init.MemoryDataWidth = FMC_NORSRAM_MEM_BUS_WIDTH_16;
  hnor1.Init.BurstAccessMode = FMC_BURST_ACCESS_MODE_DISABLE;
  hnor1.Init.WaitSignalPolarity = FMC_WAIT_SIGNAL_POLARITY_LOW;
  hnor1.Init.WrapMode = FMC_WRAP_MODE_DISABLE;
  hnor1.Init.WaitSignalActive = FMC_WAIT_TIMING_BEFORE_WS;
  hnor1.Init.WriteOperation = FMC_WRITE_OPERATION_ENABLE;
  hnor1.Init.WaitSignal = FMC_WAIT_SIGNAL_DISABLE;
  hnor1.Init.ExtendedMode = FMC_EXTENDED_MODE_DISABLE;
  hnor1.Init.AsynchronousWait = FMC_ASYNCHRONOUS_WAIT_ENABLE;
  hnor1.Init.WriteBurst = FMC_WRITE_BURST_DISABLE;
  hnor1.Init.ContinuousClock = FMC_CONTINUOUS_CLOCK_SYNC_ONLY;
  hnor1.Init.PageSize = FMC_PAGE_SIZE_NONE;
  /* Timing */
  Timing.AddressSetupTime = 4;
  Timing.AddressHoldTime = 15;
  Timing.DataSetupTime = 7;
  Timing.BusTurnAroundDuration = 1;
  Timing.CLKDivision = 16;
  Timing.DataLatency = 17;
  Timing.AccessMode = FMC_ACCESS_MODE_A;
  /* ExtTiming */

  if (HAL_NOR_Init(&hnor1, &Timing, NULL) != HAL_OK)
  {
    Error_Handler( );
  }

  /** Perform the SDRAM1 memory initialization sequence
  */
  hsdram1.Instance = FMC_SDRAM_DEVICE;
  /* hsdram1.Init */
  hsdram1.Init.SDBank = FMC_SDRAM_BANK1;
  hsdram1.Init.ColumnBitsNumber = FMC_SDRAM_COLUMN_BITS_NUM_9;
  hsdram1.Init.RowBitsNumber = FMC_SDRAM_ROW_BITS_NUM_12;
  hsdram1.Init.MemoryDataWidth = FMC_SDRAM_MEM_BUS_WIDTH_32;
  hsdram1.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4;
  hsdram1.Init.CASLatency = FMC_SDRAM_CAS_LATENCY_3;
  hsdram1.Init.WriteProtection = FMC_SDRAM_WRITE_PROTECTION_DISABLE;
  hsdram1.Init.SDClockPeriod = FMC_SDRAM_CLOCK_PERIOD_2;
  hsdram1.Init.ReadBurst = FMC_SDRAM_RBURST_ENABLE;
  hsdram1.Init.ReadPipeDelay = FMC_SDRAM_RPIPE_DELAY_0;
  /* SdramTiming */
  SdramTiming.LoadToActiveDelay = 2;
  SdramTiming.ExitSelfRefreshDelay = 7;
  SdramTiming.SelfRefreshTime = 4;
  SdramTiming.RowCycleDelay = 7;
  SdramTiming.WriteRecoveryTime = 2;
  SdramTiming.RPDelay = 2;
  SdramTiming.RCDDelay = 3;

  if (HAL_SDRAM_Init(&hsdram1, &SdramTiming) != HAL_OK)
  {
    Error_Handler( );
  }

  /* USER CODE BEGIN FMC_Init 2 */
  /* SDRAM initialization sequence */
  BSP_SDRAM_Initialization_sequence(REFRESH_COUNT);
  /* USER CODE END FMC_Init 2 */
}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOE_CLK_ENABLE();
  __HAL_RCC_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __HAL_RCC_GPIOG_CLK_ENABLE();
  __HAL_RCC_GPIOJ_CLK_ENABLE();
  __HAL_RCC_GPIOI_CLK_ENABLE();
  __HAL_RCC_GPIOK_CLK_ENABLE();
  __HAL_RCC_GPIOF_CLK_ENABLE();
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOG, FRAME_RATE_Pin|MCU_Pin|VSYNC_Pin|RENDER_TIME_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_13|GPIO_PIN_14, GPIO_PIN_RESET);

  /*Configure GPIO pins : FRAME_RATE_Pin MCU_Pin VSYNC_Pin RENDER_TIME_Pin */
  GPIO_InitStruct.Pin = FRAME_RATE_Pin|MCU_Pin|VSYNC_Pin|RENDER_TIME_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);

  /*Configure GPIO pins : PB13 PB14 */
  GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_14;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

}

/* USER CODE BEGIN 4 */

/**
  * @brief  Programs the SDRAM device.
  * @param  RefreshCount: SDRAM refresh counter value 
  * @retval None
  */
void BSP_SDRAM_Initialization_sequence(uint32_t RefreshCount)
{
  FMC_SDRAM_CommandTypeDef Command = {0};
  __IO uint32_t tmpmrd = 0;
  
  /* Step 1: Configure a clock configuration enable command */
  Command.CommandMode            = FMC_SDRAM_CMD_CLK_ENABLE;
  Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
  Command.AutoRefreshNumber      = 1;
  Command.ModeRegisterDefinition = 0;

  /* Send the command */
  HAL_SDRAM_SendCommand(&hsdram1, &Command, SDRAM_TIMEOUT);

  /* Step 2: Insert 100 us minimum delay */ 
  /* Inserted delay is equal to 1 ms due to systick time base unit (ms) */
  HAL_Delay(1);
    
  /* Step 3: Configure a PALL (precharge all) command */ 
  Command.CommandMode            = FMC_SDRAM_CMD_PALL;
  Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
  Command.AutoRefreshNumber      = 1;
  Command.ModeRegisterDefinition = 0;

  /* Send the command */
  HAL_SDRAM_SendCommand(&hsdram1, &Command, SDRAM_TIMEOUT);  
  
  /* Step 4: Configure an Auto Refresh command */ 
  Command.CommandMode            = FMC_SDRAM_CMD_AUTOREFRESH_MODE;
  Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
  Command.AutoRefreshNumber      = 8;
  Command.ModeRegisterDefinition = 0;

  /* Send the command */
  HAL_SDRAM_SendCommand(&hsdram1, &Command, SDRAM_TIMEOUT);
  
  /* Step 5: Program the external memory mode register */
  tmpmrd = (uint32_t)SDRAM_MODEREG_BURST_LENGTH_1          |\
                     SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL   |\
                     SDRAM_MODEREG_CAS_LATENCY_3           |\
                     SDRAM_MODEREG_OPERATING_MODE_STANDARD |\
                     SDRAM_MODEREG_WRITEBURST_MODE_SINGLE;
  
  Command.CommandMode            = FMC_SDRAM_CMD_LOAD_MODE;
  Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
  Command.AutoRefreshNumber      = 1;
  Command.ModeRegisterDefinition = tmpmrd;

  /* Send the command */
  HAL_SDRAM_SendCommand(&hsdram1, &Command, SDRAM_TIMEOUT);
  
  /* Step 6: Set the refresh rate counter */
  /* Set the device refresh rate */
  HAL_SDRAM_ProgramRefreshRate(&hsdram1, RefreshCount); 
}


static void LCD_init(void)
{
	LCD_RST_HIGH;
	HAL_Delay(1); // Delay 1ms
	LCD_RST_LOW;
	HAL_Delay(10); // Delay 10ms // This delay time is necessary
	LCD_RST_HIGH;
	HAL_Delay(120); // Delay 120 ms
	///************* Start Initial Sequence **********//

	SPI_WriteComm(0xE0);   //P-Gamma
	SPI_WriteData(0x00);
	SPI_WriteData(0x03);
	SPI_WriteData(0x0C);
	SPI_WriteData(0x09);
	SPI_WriteData(0x17);
	SPI_WriteData(0x09);
	SPI_WriteData(0x3E);
	SPI_WriteData(0x89);
	SPI_WriteData(0x49);
	SPI_WriteData(0x08);
	SPI_WriteData(0x0D);
	SPI_WriteData(0x0A);
	SPI_WriteData(0x13);
	SPI_WriteData(0x15);
	SPI_WriteData(0x0F);

	SPI_WriteComm(0XE1);   //N-Gamma
	SPI_WriteData(0x00);
	SPI_WriteData(0x11);
	SPI_WriteData(0x15);
	SPI_WriteData(0x03);
	SPI_WriteData(0x0F);
	SPI_WriteData(0x05);
	SPI_WriteData(0x2D);
	SPI_WriteData(0x34);
	SPI_WriteData(0x41);
	SPI_WriteData(0x02);

	SPI_WriteData(0x0B);
	SPI_WriteData(0x0A);
	SPI_WriteData(0x33);
	SPI_WriteData(0x37);
	SPI_WriteData(0x0F);

	SPI_WriteComm(0XC0);  //Power Control 1
	SPI_WriteData(0x17);  //Vreg1out
	SPI_WriteData(0x15);  //Verg2out

	SPI_WriteComm(0xC1);  //Power Control 2
	SPI_WriteData(0x41);  //VGH,VGL

	SPI_WriteComm(0xC5);  //Power Control 3
	SPI_WriteData(0x00);
	SPI_WriteData(0x12);  //Vcom
	SPI_WriteData(0x80);

	SPI_WriteComm(0x36);   //Memory Access
	//SPI_WriteData(0x08); 		// MY(D7),MX(D6),MV(D5)=000 : rb mirror
	//SPI_WriteData(0x48); 		// MY(D7),MX(D6),MV(D5)=010 : ru normal
	//SPI_WriteData(0xC8);   	// MY(D7),MX(D6),MV(D5)=110 : lu mirror
	//SPI_WriteData(0x28);   	// MY(D7),MX(D6),MV(D5)=001 : rb normal flickering, display weird
	SPI_WriteData(0xE8);   	// MY(D7),MX(D6),MV(D5)=111 : ok but flickering
	//SPI_WriteData(0xA8);   	// MY(D7),MX(D6),MV(D5)=101
	//SPI_WriteData(0x88);   		// MY(D7),MX(D6),MV(D5)=100

	SPI_WriteComm(0x2A);	// Column Address Set
	SPI_WriteData(0x00);	// SC[15:8]
	SPI_WriteData(0x00);	// SC[7:0]
	SPI_WriteData(0x01);	// EC[15:8]
	SPI_WriteData(0xDF);	// EC[7:0]   --> 479 = 0x1DF

	SPI_WriteComm(0x2B);	// Page Address Set
	SPI_WriteData(0x00);	// SP[15:8]
	SPI_WriteData(0x00);	// SP[7:0]
	SPI_WriteData(0x01);	// EP[15:8]
	SPI_WriteData(0x3F);	// EP[7:0]	 --> 319 = 0x13F

	SPI_WriteComm(0x3A);   // Interface Pixel Format
	SPI_WriteData(0x66);	// 18 bits / pixel

	SPI_WriteComm(0XB0);   // Interface Mode Control
	SPI_WriteData(0x00);

	SPI_WriteComm(0xB1);   //Frame rate
	SPI_WriteData(0xA0);  	//60Hz

	SPI_WriteComm(0xB4);   //Display Inversion Control
	SPI_WriteData(0x02);  //2-dot

	SPI_WriteComm(0XB6);  //RGB/MCU Interface Control
	SPI_WriteData(0x20);  //MCU 02
	SPI_WriteData(0x02);  //Source,Gate scan direction

	SPI_WriteComm(0XE9);   // Set Image Function
	SPI_WriteData(0x00);  // Disable 24 bit data input

	SPI_WriteComm(0xF7);    // Adjust Control
	SPI_WriteData(0xA9);
	SPI_WriteData(0x51);
	SPI_WriteData(0x2C);
	SPI_WriteData(0x82);   // D7 stream, loose

	SPI_WriteComm(0x11);   //Sleep out
	HAL_Delay(120);
	SPI_WriteComm(0x29);  //Display on
	//SPI_WriteComm(0x2C);  //Memory Write
}

static void SPI_WriteComm(uint8_t comm)
{
	uint8_t result = 0;
	uint16_t result16[]={0};

	result = Bit_Reversal(comm);
	result16[0] = ((uint16_t)result << 1) | 0 ;
	  while (HAL_USART_GetState(&husart2) != HAL_USART_STATE_READY)
	  {
	  }
	  LCD_CSX_LOW;
	  HAL_Delay(1);
	if(HAL_USART_Transmit_IT(&husart2, (uint8_t*)result16, 1)!= HAL_OK)
	  {
		//BSP_LED_On(LED3);
		while(1)
		{
		}
	  }
}

static void SPI_WriteData(uint8_t data)
{
	uint8_t result = 0;
	uint16_t result16[]={0};

	result = Bit_Reversal(data);
	result16[0] = ((uint16_t)result << 1) | 1 ;
	  while (HAL_USART_GetState(&husart2) != HAL_USART_STATE_READY)
	  {
	  }
	  LCD_CSX_LOW;
	  HAL_Delay(1);
	if(HAL_USART_Transmit_IT(&husart2, (uint8_t*)result16, 1)!= HAL_OK)
	  {
		//BSP_LED_On(LED3);
		while(1)
		{
		}
	  }
}

static uint8_t Bit_Reversal(uint8_t v)
{
	uint8_t result = 0;

	result = ((v << 7) & 0x80) | ((v << 5) & 0x40) | ((v << 3) & 0x20) | ((v << 1) & 0x10) |\
			((v >> 7) & 0x01) | ((v >> 5) & 0x02) | ((v >> 3) & 0x04) | ((v >> 1) & 0x08);
	return result;
}

void HAL_USART_TxCpltCallback(USART_HandleTypeDef *husart)
{
	LCD_CSX_HIGH;
}
/* USER CODE END 4 */

/* USER CODE BEGIN Header_TouchGFX_Task */
/**
  * @brief  Function implementing the TouchGFXTask thread.
  * @param  argument: Not used 
  * @retval None
  */
/* USER CODE END Header_TouchGFX_Task */
__weak void TouchGFX_Task(void *argument)
{
  /* USER CODE BEGIN 5 */
  /* Infinite loop */
  for(;;)
  {
    osDelay(1);
  }
  /* USER CODE END 5 */
}

/**
  * @brief  Period elapsed callback in non blocking mode
  * @note   This function is called  when TIM6 interrupt took place, inside
  * HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment
  * a global variable "uwTick" used as application time base.
  * @param  htim : TIM handle
  * @retval None
  */
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
  /* USER CODE BEGIN Callback 0 */

  /* USER CODE END Callback 0 */
  if (htim->Instance == TIM6) {
    HAL_IncTick();
  }
  /* USER CODE BEGIN Callback 1 */

  /* USER CODE END Callback 1 */
}

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */

  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
